Abstract
HLA-B27 represents a family of closely related antigens. Six alleles which differ in a limited number of nucleotide substitutions have been described (B*2701—B*2706). These changes are clustered in α1 and α2 domains. Polymerase chain reaction strategies were designed to amplify specific regions of class I exons 2 and 3. Amplified sequences were tested with eight sequence-specific oligonucleotides to distinguish all B27 subtypes. We also subtyped B27 in 50 healthy Spanish individuals using this procedure. The B*2705 subtype is over-represented in our population (96%). The remaining 4% carried the B*2702 allele. This finding is in agreement with the frequencies described by other techniques (cytotoxic T lymphocytes and isoeletric-focusing) for Caucasian populations. Class I oligotyping is a poorly developed field with significant potential applications. This procedure of genotyping B27 alleles is a reliable method which can be used in transplantation and B27-associated disease studies.
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Dominguez, O., Coto, E., Martinez-Naves, E. et al. Molecular typing of HLA-B27 alleles. Immunogenetics 36, 277–282 (1992). https://doi.org/10.1007/BF00215655
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DOI: https://doi.org/10.1007/BF00215655